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Corsair Hydro H70 Liquid CPU Cooler E-mail
Reviews - Featured Reviews: Cooling
Written by David Ramsey   
Monday, 07 February 2011
Table of Contents: Page Index
Corsair Hydro H70 Liquid CPU Cooler
Closer Look: Corsair CWCH70
Corsair CWCH70 Detailed Features
Heatsink Test Methodology
Testing and Results
Final Thoughts and Conclusion

Corsair Hydro Series H70 CPU Cooler Review

Although there were previous entries in the field, Corsair's Hydro Series H50 all-in-one sealed liquid cooling system was one of the first that actually worked, in the sense of being easy to install, reliable, and most importantly offering performance competitive with good air coolers while being quieter than most of them. The H50 became very popular and spurred competition from other vendors. The Corsair Hydro Series H70 improves upon the H50 design with a new pump and a much thicker radiator equipped with dual fans. It should offer significantly better performance than the H50, and Benchmark Reviews puts it to the test against a collection of air and water coolers to see how it compares.

Since all retail CPUs are boxed with perfectly good coolers (which are pretty quiet), the main reason to buy an aftermarket cooler is its performance when your processor is overclocked. (There might be some who buy coolers based on the aesthetics of their appearance through a windowed CPU case, but we'll assume they're in the minority.) But while performance is certainly the main criterion, other factors must be taken into consideration as well, such as noise, size, and price. The ideal cooler keeps your processor at or near ambient temperature, is silent, free, and unfortunately doesn't exist. Manufacturers vary the performance, noise, size, and cost factors of their products to address different segments of the market.

corsair_h70_pump_radiator.jpg

Corsair made their reputation in the enthusiast market with their memory products, which offered excellent performance and impressive visuals (who else sells colored accessory fins for their memory modules?), and has begun branching out into other areas with some notable successes such as the original Hydro Series H50 and the award-winning Obsidian 800D case. They also sell power supplies and USB and SSD drives.

Manufacturer: Corsair
Product Name: Hydro Series H70
Model Number: CWCH70
Price As Tested: $109.99 at Newegg

Full Disclosure: The product sample used in this article has been provided by Corsair.

Corsair H70 Specifications

Warranty 2 years
Cold Plate Material Copper
Fan Specification 120mm (x2), selectable 2000 RPM or 1600 RPM
Socket Support AMD AM2, AMD AM3, Intel LGA1155, Intel LGA 1156, Intel LGA1366, Intel LGA775
Radiator Aluminum, 120mm Width 152mm Height 48mm depth
Tubing Low permeability for near-zero evaporation, 9"-10" length
Fluid Water with added propylene glycol as an anti-fungal and corrosion inhibitor
Pump power cable length 12"-13"



 

Comments 

 
# Idea.Succellus 2011-02-08 02:08
You could put a symbology of all your awards so newcomers know how good the product is according to the award.
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# RE: Idea.Olin Coles 2011-02-08 08:26
The final score is a 10-point value, and should be an easy indicator for newcomers.
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# RE: Corsair Hydro H70 Liquid CPU CoolerRobert17 2011-02-08 05:14
I purchased an H50 last year and have it configured to exhaust outside the case and find it's performance acceptable on a day-to-day basis. It's certainly an improvement over the stock CPU coolers, and reasonably priced for that uptick.

I'll add to your note regarding the 'secret' pump performance. Besides the fluid flow, the fluid itself makes a difference and custom systems certainly have another advantage here. Different fluids and additives can increase heat transfer by decent margins. So if one is involved in serious overclocking, an open system has many advantages. But the simple and sealed packages such as the ALC and Corsair offerings are, as you said, a reliable, quiet, affordable, and easy way to increase heat displacement from the CPU.

Also note, the dual fan, push/pull configuration mounted to the radiator doesn't necessarily increase the CFM across the radiator by doubling the air flow (think of a fan as a pump for the fluid named 'air'). The same air moves through one fan, across the radiator, and then through the second radiator, fan speeds being equal. The air doesn't 'hover' around the radiator but is drawn more efficiently across the fins, and consistent pressure is maintained. To move more air, the fan speeds must be increased. Just as with any fluids, to increase flow, pumps must increase the fluid pressure. Adding more in-line pumps (fans) that all run at the same RPM doesn't increase flow, just maintains consistent pressure.
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# RE: RE: Corsair Hydro H70 Liquid CPU CoolerDavid Ramsey 2011-02-08 11:46
A push-pull configuration probably won't double airflow, but it will certainly help compared to a single fan. For "thin" radiators a single fan of "x" CFM will probably provide more airflow than a push-pull config where each fan is "x/2" CFM, but I think this would not be the case with the H70's double-thick radiator, which offers much more resistance to airflow.
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# h50 performs betterBunzing 2011-02-08 06:30
I switched motherboards a couple of weeks ago and wrecked the backplate of the h50 when I had to take it of. Corsair for some reason put superglue on it and it didn't come of without force. So I thought I'd buy an h70 and get corsair to send me a new backplate and sell the h50. Don't think I'll be getting the new backplate though since corsair won't respond to emails.

The h70 however has to be placed in the top of my cooler master cosmos s because otherwise it would interfere with the side intake fan. It runs on 1600 rpm and makes a lot more noise then my h50 (also had two fans) and runs 5C higher then the h50. Both are configured as exhausts btw.

I don't understand what causes this difference. Offcourse the sound is understandable since I had two of my own thermaltake iscg fans on it running at 1000 rpm! But still the h70 with 1600 and bigger radiator is 5C above the h50 with 38C in idle and around 42c when playing games.

If or when I get the backplate I'll do some testing wether or not there still is a big difference when I put it up in the same configuration and use the same fans as the H70.
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# RE: h50 performs betterDavid Ramsey 2011-02-08 11:47
I'm surprised the H70 is turned in higher processor temps than your H50. If you feel ambitious, it would be interesting to remove your Cosmos' side fan, put the H70 in the back, and see if that makes a difference.
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# RE: RE: h50 performs betterBunzing 2011-02-13 09:33
I'll try that when I have the time. I'm curious to see if that makes the difference.
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# RE: RE: RE: h50 performs betterBunzing 2011-03-01 03:22
Well, I placed the h70 in the back with the side off and it did shave the temps a little when it comes to case temperture but the cpu only dropped like 1c. Now i've got my h50 in the back with a thermaltake iscg fan as a second fan at 1000rpm and I have to come back on the temperture as it does run a around 4 to 5c of degrees higher than the h70 (nothing like the diference i've seen in most benchmarks where it's more like 10c). For me the amount of decibels the h50 runs lower on is the deciding factor. The temps never hit 45c, so i'm good.
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# Area mattersRealNeil 2011-02-08 06:57
For better heat dissipation they should have gone for more radiator surface area instead of a thicker radiator. A 120mmX240mm area would cool more efficiently. I realize that it would affect the fitment into a number of cases, but many cases have incorporated a spot for two 120mm fans on the topside already. Since heat normally rises, placement of such a radiator at the top of a case, exhausting the hot air through the top would just work better. I have an Asetek-LCLC (low cost liquid cooling)and a Corsair H50 here, (both are MADE by Asetek, and both are identical too) I have them in push/pull with high flow and quieter fans on each of them. They are excellent cooling solutions for my two i7-870's, both running @3.93GHz.
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# RE: Area mattersDavid Ramsey 2011-02-08 11:52
Heat-- well, heated fluids-- do indeed rise, but even the feeblest fan will provide an order of magnitude more air flow than the convection currents off a hot radiator, so I don't think radiator positioning will make a noticeable (or even measurable) difference in performance (although another commenter here who's mounted his H70 rad at the top of his case is getting worse performance than with his H50 mounted at the back, which is the opposite of what you'd expect).

A double-thick 120mm radiator offers the same surface area as a single-thickness 120x240mm radiator, although I think the latter would probably have a performance advantage due to better air flow.
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# Koolance erm-2k3u + cpu-350 + ocz freezeJuanPabloC 2011-02-08 13:01
my i7 920 @ 2.8ghz works at 21°c with 11 blocks, at "full" load (WinRar benchmark test)cpu never goes over 28°c. (43°c at the cores)... measured with HWMonitor from cpuid.com

60°C ? ... at the cores?
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# RE: Koolance erm-2k3u + cpu-350 + ocz freezeOlin Coles 2011-02-08 13:14
That's because you're using a very weak test, Juan. Plus you're comparing apples to oranges. Why not download the free AIDA64 trial and run the CPU System Stability Test tool?
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# not goodcactus 2011-02-08 23:00
It surprises me that this cooler gets a good wrap from reviewers. As the benchmark shows a highend air cooler performs better than a H70 even with its high speed/loud fans.

A highend aircooler will operate cooler even with a(good)silent 1200RPM fan like the Scythe S-Flex. I know this because i have one and its virtually silent on a Thermalright cooler. I have tested many, many fans and only the best 1200RPM fans are virtually silent, fans spinning at 1600/2000 RPM are just ridiculous.

Why would you put up with noise and pay a lot more for H70 when you can have a cheaper and virtually silent high end cooler. I can only assume some people have never experienced a silent system or know what is possible or have been sucked in by "water" cooling marketting.

And before anyone says "You can run the H70 with 1200RPM fans" the H70 suffers badly with fans at that speed and you can add 10 Degrees to temps.
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# Helpful All in one Liquid Cooler ReviewJohn Darcy 2011-02-11 03:48
Thanks for the tips and dremmel tips that are actually tried and tested. I am sometimes fearful of attempting too many cutting operations,or any at all for that matter lest I do irreparable damage to something. It isnt as if I still couldnt , however i enjoy the reviews which actually do make alterations out of the box to make something work better.
I have a gpu which seems to make in non silent even at its factory de tuned super low power usage rates. as soon as it gets beyond 32% it is audible to my old ears and after 34% it is noisy. I have a good aftermarket cooler on one 5870 and it is quieter but not silent. so the notion of a silent system as far as the cpu cooler goes is out. But, there are some good 'quiet' fans which push a fair amount of air enough dramatically reduce my Phenom II 965 in the hot summer. I do not think these liquid all in ones ready for me and my price point as yet. It is good to know how much progress is being made. I have used enough of the well reviewed air cooler/heat sink types and changed fan with good sale silent fans or 100+ cfm represented ones with 'some' noise.
i enjoy the input here on this side of the review as well for the reservoir of experience and info.
your efforts are greatly appreciated here.
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